Concrete-form.



S. R. IVICKAY.

CONCRETE FORM.

APPLICATION FILED Nov. 17. 19m.

1,300,435, Patented Apr. 15, .1919.

2 SHEETS-SHEET I.

LVB/vrom, 5 MKM,

En s'ra'rEs PATENT oEEioE.

STEWARTR. MoKAY, OF CLEVELAND, OHIO, ASSIGNOR TO MUKAY CONCRETE FORM COMPANY, OF SEWAREN, NEW` JERSEY, A CORPORATION OF NEW JERSEY.

CONCRETE-Foam..

Specification of Letters Patent.

Patented Apr. 15, 1919.

Application led November 17, 1914. Serial No. 872,648.

-which forms or frames the material may [be placed in ya wet and semi-plastic condition and allowed to set and harden. It is the general object of the invention to provide a frame or form which is adapted not only for the ordinary flat wall construction but which poesses great flexibility, whereby it may be used, with a minimum of alterations and additions, for various jobs incidental to building and other constructions. The invention contemplates the use of a unit (having a pair of posts, an interposed plate, and clamping devices for. securing the plate to the posts) which unit is particularly svell adapted for simple flat-wall con-struction or simple arch construction. In addition to this unit (which in broad aspect is set forth in my application No. 704,472 filed June 19, 1912) the invention herein contemplates the employment of cooperating features of construction whereby the corneis of walls mayA be conveniently and economically constructed. Further and more limited objects of the invention will appear hereinafter in connection with the detailed description and will be set forth, in the essential combinations of elements, in the claims hereto annexed.

In the drawings forming part hereof, Figure 1 represents a perspective view showing my invention as employed in the construction of side walls, vertical corners, ceilings` andv horizontal corners; Fig. 2 is a detail in section and Fig. 3 a detail in perspective, with parts broken away, of one of the clamping devices by which the plates maybe secured to opposite sides of a post; Fig. 4 is a'hoi'izontal sectional view of my form as employed in the construction of a vertical corner and the side walls adjacent thereto; Fig. 5 is a detail of a corner clamping device for the mold plates; and Fig. 6 a detail in perspective of the top and one of the lat-eral edges of a mold plate showing the. preferred' construction of the metal reinforcement therefor.

Describing by reference characters the various par-ts illustrated herein 1, 1 denote the outer faces of -hollow metallic posts and 2 the interposed removable plate of one of the units referred to hereinbefore. The

Aterm plate is employed herein in its gcneric sense, and it is not intended-by the use. of this term (except as hereinafter set forth) to limit the plate to any particular kind of material, leaving to the judgment of the builder the material which may seem most suitable for any molding operation.

vThe particular plate which is illustrated herein comprises a plurality of boards having their inner faces and their top and bottom edges provided with a smooth me- 75 tallic lining (preferably steel) indicated at 2 and 2, The lateral edges 'of the boards are reduced to provide a shoulder or tenon 3 which is inclosed within and protected by a metallic channel 4 (see Figs. 2 and 6). 80

The details of this metallic protection will be described hereinafter. The later-al edges of the plate aretlius protected by the channel iron, and the plate is adapted to be inv sert/ed between the sides of the posts, which post-s are preferably of channeled metal having the web 1 presented outwardly (or away from the work) and the inclined sides 1" coperating with the lateral edges of the plates to prov-ide an increasing clearance between such edges and such lateral opposed sides as the plate is moved outwardly, or away from the work. At their inner ends the sides 1b are turned outwardly, as shown at 1c, forming a surfaceagainst which the 95 channeled edges 4 of the plates may rest when the latter are clamped in place, makf ing a tight joint through which the concrete cannot leak. A plate 1d extends across and closes the space between the flanges 1, being 100 secured thereto in any suitable manner.'

Cooperating with each pair of posts 1 and the interposed plate or plates 2 is a ranger 15 which may be secured to the posts-and associated therewith and which serves to posit-ion and, in effect, to assemble the posts in proper relation to receive therebetween the molding plate.

For the purpose of securing the plates between the posts, I prefer to employ clamps of .the character illustrated Ain Figs. 1, and.

3. Each of these clamps comprises a U- shaped yoke having the inwardlypro'ecting legs 5 and the connecting web 6. -T e legs are adapted to engage the channels 4 at the edges of adjacent plates 2 andthereby to force such plate edges against their seats Aupon the posts. The yoke may be made ofl channeled or yflanged metal, the flanges belng indicated at 7 For the purpose of forcing l the yokes inwardly 'agalnst the channeled vtenons of the plates, I prefer-to employ a special locking device for the yokes, which locking device may be capable of an adjustment enabling the yokes to `be turned at right 4'angles to thelr locking positionl and vin lline or webbed face 1 thereof.

with the posts and Iresting a ainst the outer l or thev purpose of securing these yokes in various `positions alon the posts, I provide the posts with a suita le number of key-hole slots comprising each a central circular opening 8 and a pair of narrow slots 9 extending yin opposite directions therefrom lengthwise of` the osts. Each key-hole slot isada ted to recelve a bolt which forms part of t e locking device `for the clamp. The bolt is shown in detail .in Figs. v2 4and 3 and is conveniently constructed from two metal plates 10, 10 lriveted' together. At their inner ends, these plates are rounded and bent outwardly, as shown at 11, to form a head. Intermediate of `their ends, the :plates are provided with outwardly pressed tongues 12 constitutingba head `,of -less width than the head formed the .projections 11. At its outer c nd, the bolt formed by the plates 10 is provided with a slot 13 which is adapted to receive a wedge vkey 14. The :head 11 is of greater diameter than the central ypart 8 of the .key-hole slot while the lhead 12 is of Aless diameter than lsuch central opening. In assembling, it Iwill be necessary to insert the lbolts `before the plate l1d is applied to the'post. The operation will .now4 be apparent, especially in connec- =tionwith Figs. 2 and 3, wherein the yoke and bolt are shown in the positions which they occupy when the parts are locked inplace by the'yoke, thekey 1'4 being driven into the slot 13-so as to hold the ends of the yoke legs in engagement with the channeled tenons 4 and lthe bolt having been moved into one of the kretained in place in central position by the engagement ofthe head 11 with the opposite sides'of the central opening 8. The distance between `the heads 11 and 12 is such that, when the head 11 is in engagement with the `at rig t angles to the positions shown Ain'F-igs.

'2 and 3, whereupon, by' drivingin the key 14, the yoke may lbe' retained against the outer face of the' post with the ends of .the legs 5 'bearing against said facesee the clamp marked D, Fig. 1. The yokeand keys will then extend longitudinallyof thepostsa position wherein they are accessible for reuse and wherein they do not materially interfere with the shifting or transportation of the posts. v.

As I have before stated, a spair of yposts 1 .with a cooperating plate 2, `and securing yokes 5 to secure -the plate`2 tothe post 1,*I t,ermaunit.i,` f f I I prefer to'construct the ranger, for. ordinary work, from ametallic channel 15'3L having its langesprojected outwardly and yhav- `ing therewith-inra wooden iller block y16, I.The filler block as its name indicates formsa Vfilling yfor the, channel 15a. and forms a body :to accommodate-the bolts 18 aslater explained.

Where used in ordinary wall or archY construction, the ranger will extend in this form across a pai-r of `posts and `the interposed metal plate, being lprovided in its inner surface with lnotches 17 which are adapted fto receive therewithin the louter faces of the said posts, thereby conveniently to position the rangers with reference kto the posts and .prevent lateral movement betweentheposts and the ranger.v For connecting the ranger to the posts, I may use a bolt v18similar to thebolts 10--13 hereinbefore described, except that .but one head (thesmallerone) will be necessary in ordinary .wall or arch construction,

the wedge key 19 ybearing directly againstv the wood filler 16.` However, where the ranger is extended-to coperate with a corner construction, such as shown in Fig. 1, the woodenl filler :block 16 -will preferably 'be omitted insuch extension and a saddle :may then be employed similartoi-the yoke shown injFigs 2 and Stand secured to the post ,in like manner-as by a bolt v18. {This-special ranger construction will be referredtoihereinafter in connection with lthe details ofthe form as applied to.corner construction The description has thus far been confined to but one side of the former mold, yit being obvious to those skilled in this art that Athe opposite side of the rform will be constructed in substantially lidentical manner and ythat the opposed sides will be connected by suitable stay bolts. yFor the purpose of so connecting the sides, I lprefer to employ hollow elliptical stay bolts 20 having openings through the ends thereofforthe reception of wedge keys 22.

On the left side of Fig. 1 my form is shown as applied to a wall corner and for this purpose each side of the form' is shown as comprising a pair of units with the interposed corner molding members, with such modifications of the rangers as will adapt them for use in lconnection with the said members.v The corner molding construction comprises a pair of plate members 40 each having one lateral edge extending in proximity to and preferably forming a cover for the inner face of the unit post which ispadjacent to the corner; the opposite lateral edge of each of these plate members overlaps the outer lateral edge of the adjacent member of a metallic corner section, the first-mentioned plate member constituting adjustable bridges between the unit posts and the ,corner section, Which will now be described, vwith particular reference to the inside vcorner construction. 41 denotes a pair of plate members preferably cast or formed integrally with each other and ar-' ranged at the desired angle to constitute an angle section adapted for the particular wall corners to be molded. Across .the corner across such line. y

remote edges, the plate members 41 are bent pslot' 50 (preferably in the plate 41)'.

or angle 42 between these plates there exy tends a Web 43 which is provided with lateral flanges 44 whereby it may be secured to the plates 41. This web constitutes in effect a post to which the angle between the corner ranger sections may be secured, and said web is provided with -a vertically arranged series of key hole slots 45, which extend transversely of the web and preferably with the circular portion of the slot at one side of the longitudinal central line of the web and the reduced portion extending At their outer or cornerinto channel form to provide hollow vertical posts 46 andthe flange 47 which is parallel with the body of the plate is provided with key hole slots 48 similar to the slots 8 in the unit posts.v v v In order to secure the-plate members 40 and 41, one of these plate members (as 40) is provided with. a bolt or bar 49 projecting therefrom and adapted to be inserted in wedge key 51 can be driven through an aperture in 'the bar or-bolt 49 and thus connect the plate members 40 and 41.

= 1I contemplate using myv rangerconstrucwith respect to the unit rangers may be secured by means of apertures 53 in the top vandl bottom flanges which coperate with apertures in the reduced ends 15 of the unit rangers and with a locking wedge key 54. Inorder to secure these outwardly opening channels to the post faces 1a and 47 and at the same time employ substantiallythe samev `52, said gusset extendingv across thetop` of the upper ilanges of the ranger branches. This gusset is' provided with a vertically extending channel 57 having Iits flangespresented inwardly, or toward the corner, and this channel is provided with an opening through whichv a locking bolt (secured to the web) 57 may extend, said bolt being provided with an aperture for the wedge key 58.

In Fig. 4 there is shown a horizontal sectional view of my formas' applied to the corner, the view being taken through the ranger and showing the outer portion of the mold frame. In this view the parts of the outer corner frame which correspond to thev inner vframe are given thesame designating numerals as the inner corner-frame parts,` with the exponent a The clamping devices for the rangers, being identical with those used with the inner frame section, will be given the' same identifying characters. The

ranger sections 52, instead of meeting at l right angles to each other (as is the case with the inner corner ranger-sections) are connected by an intermediate section 52E which extends at substantially 135 yfrom each section 52a and is so arranged that its Y l inner vface 52,c will abut against the corner between the plates 41. i

'At the right hand of Fig. 1 my form is shown as arranged and adapted for ceiling construction, including the inclosing and protecting of a depending ceiling beam. The form which is shown as applied to the ceiling is essentially thel same as that employed for curved or flat arch construction, the detailed construction being shown, described and claimed in my application ySerial No. 137,089 filed Dec.I 15, 1916, Patent No. 1,236,852, Aug. 14, 1917. In Fig. 1, B and B `represent two of the structural I-'beams employed in building construction. onel of which beams, B. is shown as embedded in one `of the walls or partitions; the other beam. B. is of such depth as `to extend below the ceiling C proper and hence need las . tobe inclosedv within a special depending part-.f ofi-the; ceiling. 59. denotes apair of' brackets eachy ofS which is recessed wherebyl they may be applied r to and" suspended from vthe lower flange ofi the I`beam\B. beneath' the 'recesses for the I-beani=ilaige,f ythe brack` etsare further recessed for thefreceptioniof theboard 60 which forms the'bottonuy off.' the mold; which' extends about andi includes the of* the vertical posts of the ceiling form.

This carrieror base may .be conveniently formed from a channel? section'y 61vr which. may be inserted through' the brackets 59.

'lfhis carrier or. base may be supported in any desiredposition, asfby means of'- openings (n'ot. shown) in the. depending channel` inserted through such openings. The 'web ofthecarrier 61 will support the lower ends of; the short vertica11posts63, whichzposts merge at theirupper ends with and support the transversely extending post. sec tions 64. -Thelower endsofthe posts 63 may each be secured andi braced upon the top of the carrier b (preferably of woo) bearing at one edge against the post and raced thereagainst by means of an angle plate 66' anda wedge key 67 driven through an opening in-y the base of saidl plate and an opening in the web ofthe carrier 61. The posts 63 may bev ItE will be obvious that the construction de-v scribed hereinbefore as applicable to the lower flange of an I-beam maybe applied in the samemanner to the lower flange of a 'Tf-beam.

At the corner formed between eachl upy rightpost 63 and the horizontal transversely extending` post section 64, a clamp for the side and ceiling plates is provided, said clamp being` indicated. generally at 468 Aandl being substantially identicalwith the clam s 5,6, 14, andy 19 heretofore described, t e, only difference being that the bolt 69 extends through 'an opening in the corner formed between the post 63 and the trans'- p verse section 64, providing avcorresponding inclination for the clamp 68 whereby itmay operate upon the ends of'thevertically and its upper end the post 63a merges with and f supports a transverse post section 64, similar to the post section 64. A corner clamp means ofr a block65 the verticaLwall unit for'mlshown inFig. 1`:

`and are;` designated' in: like manner. The

opposed;` ends ofthe post sectionsi 64', 64 telescope' within an' interposed posti section'y y l which-.supports a plate 72. Forordinary lower.' flange of' thev I'be'am.l Supported by v the brackets isa carrier for. thev lower ends.

straight.` ceilingv construction, the posts 63,

63, 64, 64"* and-65 andy theclampingimem= bers associated therewith will-be' duplicated:

wherebyr theceiling and the beam-.inclosing mold plates 'will `rbe carriediby 4 and between aw pair of similarly constructed` supports eachg comprising a pair of:` verticali posts with. adjustable transverse posts connected there-` to. However,when operating` upon'the cor# ner ofaroom, it will be necessary .to modify the supporting. construction in. the'. manner;Y

shown :in-Figs. 1 and`5. In'thiscase, brack-l ets 59, are suspendedi from;the beam B in the same manner asshown atthe right hand l' end*` ofV Fig. 1 andvthese brackets carry the channeled base 61 with, the angle plate 66y and thejwedge key 67, the wooden block 65a in this case being` beveled at: its. inner .endl l ftobear against the corner -web7 3, which is similar to the web 43andwhich constitutes a verticali Acorner p ostv for the form; This web is provided with a vertical series Voff horizontally disposedtkey hole slots 74'which are adapted to receive bolts 75 having heads 76 adapted to beinserted through the en-V- largedportions of the slots and to bel engaged by the metal: surroundingthe reduced portionsfofv the slots.V At their outer ends,

the bolts 75 are adapted to extendk through an opening provided in an angle clamp 7 6**y the opposite beveled ends. 7-7 whereof are adapted to engage ythe ends of theplates2, thereby to retain them in place.,`

losv

For remforcing the mold boards or plates,.. I prefer to use the construction illustrated,`

in detail in Figs. 2, 3'and 6. Each mold distance within the inner face.- .This score..

is adapted to receive` the depending ange 2c of the top or bottom plate 2, which flange may be-convementlyformed by folding the metal upon itself, wherebythe` thickness of the` ange is double that of; the metal.- `A L -vertical score 2e `is provided at each lateral` l'edge of the mold board or plate which ver` tical scores `merge with the scores 2". These vertical scores are yadapted to receive a vertical flange 2t of a narrow reinforcing plate,

which `flange is similar in construction tov is provided at each end with a shouldered 1516v Y board or plate 2 is provided with? ascore 2" l at the top andbottomthereof andlat a'. short" extension 2h which is ofl substantially the same length as the top and bottom of the tenon 3 and is of the same width as said tenon, including the additional width due to the reinforcing plate 2g. At `its outer end, each shoulder 2" is bent at substantially right angles to provide a retaining hook or ilange 2k, which may be received within a rabbet 3a at the upper or lower end of each tenori ,3. Each retaining flange 2k may be slotted, as shown at 2, for the reception of the screw by means of which the channel 4 is secured to the tenon.

When assembled,l the..plate 2d is on top (or on the bottom) of the mold plate orv board with its iange 2c seated within the appropriate score 2". The flange 2r is seated within the vertical score 2e with the extension.2g.tting alongside the innersurface of the tenon 3, the flange 2 being cut away, as indicated at 2m, to accommodate the upper end of the flange 2f. The channel 4 extends around the tenon 3 and the plate 2g. The lining plate 2El may be secured in place by spot welding to the flanges 2f. This construction insures eiiicient protection for the plate will be assumed to be in a vertical position, in which case the lateral. or sidev edges will be provided with shoulders or tenons and the top and bottom edges with the protecting plate 2b., I do not propose, however, to be limited by such convenient descriptive language to the use of these plates only in the construction of vertical walls, such limitation being contrary to the spirit of the invention, and especially to the ceiling or arch construction disclosed hereinbefore.

From the foregoing description, taken with the drawings, it will be evident that I have produced a concrete form which is extremely flexible, and that` in most uses of the form, I am enabled to employ a unit consisting of a pair of posts with a mold plate adapted to be inserted and clamped therebetween in various adjusted postions along said posts, with rangers connected with the posts whereby they are retained in assembled and properly alined positions, and that I am able to employ with such units suitable 'corner extensions whereby the form may be conveniently adapted for forming corner portions of walls; also to provide such unit construction with such extensions as will adapt it for use with ceiling or arch molding, including the inclosure and piro-j tection of beams; and further that I ain obvious that such details may be departed from more or lesswithout affecting the spirit of my invention; and I therefore do not propose to be limited to such details except as they may be positively included 4in the claims hereto annexed or their inythe corner range'rmay -be connected.

2. In a form of the character described, the combination of a pair of units comprising each a pair of posts, a plate removably and adjustably' connectible therebetween, a corner ranger comprising two members forming an angle with each other, a ranger member connectible to the posts of each unit and adjustably connected to the adjacent member of the corner ranger, and a corner plate to which the corner ranger may be connected.

f 3. In a form of the character described, the combination of a pair of units each unit comprising a air of posts and an interposed plate removallily and adjustably connectible therebetween, a corner section interposed between said units, a plate member interposed vto the ends of the corner ranger, and means for connecting the ranger sections to the y posts of the units.

, 4. In a form of the 'character described, the combination of a pair of units each comprising a pair of posts and an interposed plate removably and adjustably connectible therebetween, a corner section interposed between said umts, a plate member interposed between a post of each unit and the adja- -jcent lateral edge of the corner section, said plate member being' adapted to overlap the corner section, posts on the corner section,

i a corner ranger corresponding to the corner section, means for connecting the corner section to said posts, ranger sectionsadjustably connected to the ends of the corner ranger and means for connecting the'ranger sections to the posts'o the units.

. therebetween, a corner section adapted to co- 5. In a form of the character described,

' the combination of a pair of units each ,com-

prising a pair of posts and an interposed plate removably and adjustably connectible therebetween, a corner section cooperating with said units, a plate member interposed between the post ofl each unit and the adjacent lateral edgeof the corner section, said plate members being adapted to overlap the vcorner section, and means for connecting said unitsand said corner section.

6. In a form of the character described, the combination of a pair of yunits each comprising a pair of posts and a plate adjustably connectible therebetween, a plate member extending from one of the posts of'each unit, a corner section comprising a pair of angularly disposed plate members adapted to overlap the adjacent lateral edges of the iirst mentioned plate members, and means section comprising a pair ofangularly disposed plate members having the outer edges in overlapping relation to the edges of the iirst .mentioned plate members, and means for adjustably connecting said units and said late members.

8. n a form of the character described, the combination of a unit comprising avpair of postsand a plate adjustably connectible operate with said units, and means for adjustably connecting the unit and the corner section. Y

9. In a form of the character described,

- the combination of a unit comprising a pair of posts and a plate adjustably connectible` therebetween, a pair of adjustably connectible plate members extending from one of said posts, and means for adjustably connecting said unit and said members. Y

10. In a form of the character described, the combi-nation of a unit comprising a pair of posts and a plate adjustably connectible therebetween, a pair of adjustably connectible plate'members extending from one `of 'f said posts, one yfof said plate members having a post, an extensible ranger, and means for connecting said ranger to sald posts.

11. In a formof the character described,

the combination of a unit comprising a pair of posts and a plate adjustably connectible therebetween, a pair of adjustably connectible' plate members extending Vfrom one of said posts', one of said plate members having a post and means for connecting the lastprising a pair of posts, and a plate adapted to be adjustably connected therebetween, means for maintaining said units at anangle with respect to each other, said means comprising' a corner ranger the branches v whereof are connectible to the adjacent unit posts, a corner section4 comprising a pair of angularly disposed plate members each .having an outwardly projecting post, a web extending across the angle between said members, means for connecting the corner ranger to said web and to the last mentioned posts, and plate members adjustably connected to the members of the corner section and adapted to extend between the same and the adjacent unit posts.

13. In a form of the character described, the combination of a pair of units each comprising a pair of posts and a plate adapted to be adjustably connected therebetween, means for vmaintaining said units at an angle with respect to each other, said means comprising a cornertranger the branches whereof are connectible to the adjacent unit posts, a corner section comprising la pair of angularly disposed plate members, means for connecting the corner ranger to said corner section, and plate members adjustably con-A nected to the members ofthe corner section and adapted to eXtend between the same and the adjacent unit posts, the corner section being provided with posts, and means for connecting the corner ranger to the lastmentioned posts. v

14. In a -orm'of the character described, the combination of a unit comprising a pair of posts and a plate removably and adjustably connectible therebetween, a plate member projecting from one of said posts and adapted to 'form an. extension of the unit plate, a second plate member adjustably connectible to the first mentioned platel member, a post carried by one of said plate members, and an extensible and collapsible ranger connected-to said posts.

15."v In a form of the character described, the combination of a plurality of posts, plates insertible therebetween and adapted to provide jointly a support for concrete material, means for connecting said plates tothe post b y means readily disconnected whereby the molding surface provided thereby is extensible and collapsible, an ex# tensible and collapsible ranger, and means forA connecting the same to said posts.

16.-In a form of the character described, the combination of a pair of posts. a plate insertible therebebetween, means coperating with said osts for securing said plate thereto, a longltudinally extensible and coll ber the branches 'whereofl are adapted to exlapsible ranger, and means for connecting the same to said posts.

17. In a form of the character described,

the combination of a pair of posts, a plate insertible and removable between said posts, said plate having tenons or shoulders projecting from its opposed lateral edges, channeled membersi inclosing said tenons Aor shoulders and clamping means associated with said posts and adapted to engage said channeled members.

18. The combination of a pair of posts each having a lateral seat, a plate having its lateral edge provided with an outwardly 4projecting shoulder or tenon the inner faces .of said shoulders or tenons being adapted to engage said seats, and clamping means cooperating with each post to engage the outer surface of the shoulders or tenons at the adjacent lateral edge of the plate.

19. In a form of the character described, the combination of a pair of posts the opposed faces whereof are inclined inwardly and toward eachother, a plate adapted to be interposed between said posts and having at each lateral edge a shoulder coperating with the inclined surface of a post thereby to provide an'increasing clearance between said shoulders and the opposed faces of the posts as the plate is moved outwardly, and clamping means coperatingwwith each post and adapted to engage the adjacent shoulder on the plate.

20. In a form of the character described, the combination of a pair of posts each having a lateral seat, sai'd seatsl facing .eachother, Va plate adapted to be interposed between said posts and to coperate with said seats and having a tenon or shoulder at each lateral edge, a channel-shaped metal coverv ing for each of said shoulders, and clamping means coperating with each -post and adaptedto engage the vadjacent tenon or shoulder.

21. In a form of the character described the combination of a hollow' metallic post having a plurality of keV-hole slots therein, a clamping device comprising a forked memtend on opposite sides of the post, a bolt having` a pair of longitudinally spaced heads located within said post, one of said heads being of greater diameter than the enlarged portion of the key-hole slot 4and theother head being of smaller diameter than the enlarged portion of said slot, saidbolt being adapted to extend through the web of said forked member and being provided with a slot. a wedge key adapted tov be driven through the slot in said bar and mold plates supported thereby.

22. In `a form of the character described,

the combination of a post, a forked clamping member coperating with said post,

means for securing said'member to said post with its legs or branches on opposite sides thereof, mold plates'supported thereby and means whereby said member may be secured to the post in another position with the ends o f the legs or branches bearing against the outer surface of said post.

23. In a form of the character described, thecombination of a post, mold plates on each side thereof, a forked clamping member adapted to be applied to said post with its "legs or branches straddling the same, a bolt projecting through said post and connected to said clamping member, and meansv whereby said bolt may anchor the clamping member to the post with the legs straddling the same and engaging the adjacent mold plates and may in another position secure the clamping member to the post with the ends of the forks or legs resting against the outer surface of the post.

24. In a form of the character described, the combination of a hollow metal post having an opening, mold plates coperating with said post, a forked clamping member4 adapted to be applied to said post with its legs or branchesstraddling the same, a bolt projecting through said post opening and connected to said clamping member, means whereby it may be secured to the post with its outer end projecting at varying distances plates therebetween, a ranger coperating therewith and comprising telescopically connected sections, means for connecting said ranger sections in various adjusted posi` 'tions thereof, and means for clamping said l ranger sections to said posts.

In a form of the character described. the combination of a pair of posts, a ranger section connected to one of said posts and comprising a. channeled memberhaving a wooden filling block therein, and a coperating ranger section telescopically connected to the adjacent end. of the first mentioned ranger section, the second ranger section vcomprising a metallic channel shaped member, means extending through the filler block of the first ymentioned section and connecting the same to one of said posts, a bolt connected with the other post and extendingl through the second ranger section between the flanges thereof, a saddle covering the open space between the flanges of the second section-and having an aperture for the bolt, and a wedge key driven through the outer endv of said bolt and bearing against the saddle.

- 28. In a form of the character described, the combination of a plurality of posts, a mold plate extending therebetween, a ranger section comprising a channeled member having a lwooden filling block therein, and a bolt connecting the ranger section to the post and extending through the filling block. 29. In a form of the character described,

' the combination of an angular post having branches, mold plates having lateral edges adapted to substantially abut against the opposite sides of both branches of said post,

and an angular clamp applied to the angular portion of each post and adapted to engage said plates.

30. A mold plate for forms of the character set forth having its opposed lateral edges provided each with a tenon or shoulder, a lining plate applied to the inner face of the said' mold plate, a plate insertible between each lateral edge of the lining plate and the mold plate body and having an extension adapted to overlap one of the faces of the tenon, a pair of metallic plates covering respectively the top and the bottom ofthe mold plate and each having a flange insertible between the top and bottom 4edges of the lining plate and the corresponding portions of the mold plate and each having extensions covering respectively the tops4 'and bottoms of theshoulde-rs or tenons, and a metallic'channel which is adapted tobe appliedto each shoulder .or tenon and to receive therewithin the lateral extensions of the third mentioned lates.

31. A mold plate or forms of the character set forth having its opposed lateral edges provided' with shoulders or tenons and each shoulder or tenon having a notch at the top and bottom thereof, a metallic covering plate'for the top and bottom of the mold plate, each of said metallic plates having a depending flange at its inner edge and having at each end thereof an extension 'adapted to cover and protect the corresponding tenon or shoulder and each extension having an angular projection adapted to enter the corresponding recess of the tenon j. or shoulder, a metallicl plate applied to the inner face of the mold plate adjacent to each lateral edge thereof and having an'extension projecting alongside of the adjacent face of the tenon, a metallic lining plate for the inner` surface of the'mold platehaving its lateral edges overhanging the inner edges of the last described plates, land a channel member for each tenon or lshoulder and adapted to receive therewithin thel angular extensions of the top and bottom plates and the tenon-covering extension of'one of the third mentioned plates.

32. A mold platefor forms of the character set forth having its-"lateral edges provided with shoulders or" tenons and provided with a metal covering for the inner face and for the top and bottom edges thereof and with a metal covering foi` the -with the lplates to hold the plates in engagement wit the projections'upon the posts.

In testimony whereof, I hereunto afiix my signature in the presence of two witnesses.

STEWART R. MCKAY. Witnesses:

` J. B. HULL,

I. L. STOHLMAN. 

